need help with "gimp"

I need help rendering something with the program "Gimp"
I watch tutorials on youtube, but can't find the latest version tutorials that are 2.6, I gotta render some pics... I can get the path selection done.. but when I hit selection from path or what ever you hit when you are done, it outlines it, witch is what it should do.
I then go Feather and set it to 1, like it says on most tutorials, go to that invert thing, click it..I set the add the alpha so it is on, then I hit delete.. the background SHOULD go away, but it doesn't.. its startin to annoy me... Can't figure out what the problem is..

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